Title :
A robust beamformer for OFDM based WLANs against burst interference
Author :
Yu, Zhu Liang ; Yang, Fan ; Wee Ser ; Rahadja, Susanto
Author_Institution :
Center for Signal Process., Nanyang Technol. Univ., Singapore
Abstract :
A beamformer for burst interference suppression is proposed for an orthogonal frequency-division multiplexing (OFDM) system with receiver diversity. The proposed beamformer is a generalized sidelobe canceller (GSC) with a modified blocking matrix. The modified GSC blocking matrix using channel estimation results is proposed to combat the fading channel effects. Moreover, the diagonal loading method is used to obtain a beamforming performance robust against system imperfections. The simulation results show that the proposed beamformer greatly improves the system performance when strong interference exists.
Keywords :
OFDM modulation; channel estimation; diversity reception; fading channels; interference suppression; matrix algebra; radiofrequency interference; wireless LAN; OFDM; WLAN; burst interference suppression; channel estimation; cochannel interference; fading channel; generalized sidelobe canceller; interchannel interference; modified blocking matrix; orthogonal frequency-division multiplexing; receiver diversity; robust beamformer; Adaptive arrays; Antenna arrays; Digital video broadcasting; Interchannel interference; Interference cancellation; OFDM; Robustness; Signal processing; Switches; Wireless LAN;
Conference_Titel :
Signal Processing Systems, 2003. SIPS 2003. IEEE Workshop on
Print_ISBN :
0-7803-7795-8
DOI :
10.1109/SIPS.2003.1235657
